*
    margin 0
    padding 0

.header
    height 100px
    background-color green
    h1
        font-weight 700
        font-size 26px
        color blue

.footer 
    background-color pink

main
    display flex
    nav,div,aside
        height 500px
        width 200px
        background-color yellow
    nav
        background-color grey
    aside
        background-color red
    div
        width calc(100% - 400px)
    
